Title :
Fiber-optic transmissions of microwave 8-phase-PSK and 16-ary quadrature-amplitude-modulated signals at the 1.3-μm wavelength region
Author_Institution :
Bell Commun. Res., Red Bank, NJ, USA
fDate :
2/1/1988 12:00:00 AM
Abstract :
Transmissions of a 6-GHz 8-phase phase-shift-keyed (8φ-PSK) signal over a 12.5-km single-mode fiber with a 5-dB power margin and bit-error-rate (BER) of 10-10 and a 6-GHz 16-ary quadrature-amplitude-modulated (QAM) signal over the same distance with a 2-dB power margin and BER of 10-12 were demonstrated. The 8φ-PSK digital modem operated at 78Mb/s and the 16-QAM digital modem operated at 90 Mb/s. A high-speed multimode InGaAsP laser diode and a high-speed p-i-n diode were used in both fiber-optic transmission systems. Floor characteristics and power penalties observed in the BER performances of both systems were found to be caused by the intensity noise of the laser diode, particularly the reflection-induced intensity noise
Keywords :
amplitude modulation; microwave links; modems; optical communication; optical fibres; optical links; phase shift keying; 1.3 micron; 12.5 km; 16-ary quadrature-amplitude-modulated signals; 6 GHz; 78 Mbit/s; 8-phase PSK signal, floor characteristics; 90 Mbit/s; bit-error-rate; digital modem; high-speed p-i-n diode; multimode InGaAsP laser diode; power penalties; single-mode fiber; Bandwidth; Bit error rate; Diode lasers; Modems; Noise figure; Optical fiber communication; Optical noise; P-i-n diodes; Phase shift keying; Quadrature amplitude modulation;
Journal_Title :
Lightwave Technology, Journal of
